Two-way plow



Sep%., 24, 195? Filed March. 23,, 1953 H. A. PURSCHE TWO-WAY PLOW 4 Sheets-Sheet 1 flmeey a PUQSCHE,

INVENTOR.

Sept. 24, 1957 H. A. PURSCHE TWO-WAY PLOW 4 Sheets-Sheet 2 Filed March 25, 1953 n ow un a M0 #422 ,4. PUQSCHE',

INVENTOR.

United States Patent TWO-WAY PLOW Harry A. Pursclle, Gardena, Calif. Application March 23, 1953, Serial No. 343,901

2 Claims. (Cl. 97-26) This invention relates to two-way plows of the general type shown in my prior Patents Nos. 2,625,089, 2,625,090 and 2,625,091, all granted on January 13, 1953. The present invention relates to a two-way plow assembly having a single power cylinder for swinging the draft tongue and for turning the plow carrier relative to the frame.

This application constitutes a continuation-in-part of my co-pending application for two-way plow, Serial No. 336,936, filed February 16, 1953, now abandoned.

'In two-way plows of the type mounted upon a wheeled carriage it is necessary to make provision for swinging the draft tongue from side to side in order that the carriage may be properly positioned behind the tractor or other towing vehicle. It is also necessary to turn the plow carrier relative to the wheeled carriage in order to bring either the right-hand plows or left-hand plows into operative position. The swinging of the tongue and the turning of the plow carrier occur at the same time and this action takes place when the frame of the carriage has been raised to lift the plows out of the ground.

It is a principal object of this invention to provide an improved form of two-way plow assembly having a single power means for shifting the draft tongue and turning the plow carrier. Another object is to provide such a device in which both the tongue and plow carrier move simultaneously and in which neither can move separately. \Another object is to provide a device of this type employing a flexible cable which is spooled over a drum fixed relative to the carrier. Another object is to provide a two-way plow assembly having a single hydraulic power cylinder which not only acts to shift the tongue and turn the carrier but also serves to operate latching mechanism for both the tongue and plow carrier. A more detailed object is to provide a device of this type in which one end of the hydraulic power cylinder assembly serves to shift the tongue and turn the carrier and the other end serves to operate the latching mechanism. Other and more detailed objects and advantages will appear hereinafter.

Referring to the drawings:

Figure 1 is a side elevation showing a preferred bodirnent of my invention.

Figure 2 is a top plan view thereof.

Figure 3 is a sectional elevation taken substantially on the lines 33 as shown in Figure 2.

Figure 4 is a transverse sectional view taken substantially on the lines 44 as shown in Figure 3.

Figure 5 is a sectional detail showing construction of one of the plow latches.

Figure 6 is a plan view partly broken away showing a modified form of my invention.

Figure 7 is a fragmentary elevation taken substantially on the lines 7-7 as viewed in Figure 6.

Figure 8 is a longitudinal section partly broken away taken substantially on the lines 8-8 as shown in Figure 6.

Figure 9 is a view similar to Figure 6 but with the link in a different, position.

In the drawings:

The wheeled carriage generally designated 10 includes a frame 11 having parallel side members 12 and 13, a rear cross member 14 and a front curved cross member 15. Ground wheels 16 and 17 are provided on opposite sides of the carriage 10 and each of these ground wheels are mounted at the swinging end of a crank arm 18. One of the crank arms is fixed to a pivot shaft 19 and the other is fixed to a co-axial pivot shaft 20. The shafts are independently supported in bearing sleeves 21 mounted on the frame 11.

Means are provided for swinging the crank arms 18 relative to the frame 11 and, as shown in the drawings, this means includes a pair of substantially upright cylinders 22 pivotally connected at 23 to an A frame assembly 24 fixed on the frame 11. Each power cylinder 22 is provided with a piston rod 25 connected to one of the wheel arms 18. -When the piston rods 25 are extended, the carriage 10 is elevated with respect to the ground surfaces 26. The hydraulic connections 27 and 28 provide means for introducing fluid under pressure into the cylinder assemblies. The cylinder assemblies 22 are preferably connected'in parallel for simultaneous operation. The source of fluid under pressure (not shown) is carried on the tractor and connected to the power cylinders through a suitable control valve, not shown.

A longitudinal beam 29 is fixed to the curved cross member 15 at its forward end and projects through the rear cross member 14. This longitudinal beam 29 projects rearwardly from the frame 11 and serves as a sup-' I as shown in Figure 3, and includes an upper portion 39 and a lower portion 40. Aligned pivot pins 41 serve toconnect the tongue portions 39 and 40 to the longitudinal .beam 29. Rollers 42 carried on the upper tongue portion 39 roll on the curved cross member 15. A draft part 43' is pivoted to the parallel plates 44 at either one of two locations 45 or 46. if desired, pins may be insertedin aligned apertures 47 in plates 44 to limit swinging movement of the draft part 43 in either one or both directions.

It will be understood that the forward end of the draft part 43 is connected to the tractor or other towing ve hicle.

In accordance with my invention a single power cylinder assembly 48 is provided for swinging the tongue 38 and for turning the carrier 30 relative to the frame 11.

This power cylinder assembly 48 is connected at one end by means of pivot pin 49 to the bar 50; The piston rod 51 is pivotally connected at 52 to the crank arm 53. This crank arm 53 is fixed to the upper reach 39 of the tongue 38 and is braced by means of the angle strut 54.

Means are provided whereby swinging movement of the tongue 38 causes turning movement of the carrier and, as shown in the drawings, this means includes a flexible cable 55 which has a portion thereof spooled about the drum 56 fixed to the forward end of the carrier 30. The cable passes about sheaves 57, 58, 59 and 60 which are rotatably mounted on brackets adjustably fixed to the frame 11. The ends of the'cable 55 are' nected by turn buckles 62 to opposite ends of a threaded rod element 63 having a ball portion 64. This ball portion 64 is clamped between angle irons 65 and 66 and is received within the socket 67 defined between these parts. The position of these parts 65 and 66 may be adjusted along the length of the upper portion 39 to the tongue 38. From this description it will be understood that swinging movement of the tongue 38 about its pivot pins 41 causes the cable 55 to pass. over the sheaves 58 and turn the drum 56 on the carrier 30.

The bar 50 is pivoted to the beam 29 at 68. This bar swings about the pivot 68 and the extent of this swinging movement is limited by the adjustable stops 69 and 70 mounted on the frame 11. The function of the bar 50 is to operate a latching mechanism for the tongue 38 and to operate additional latching mechanism for the carrier 30.

The tongue latching mechanism includes the latches 71 and 72 which are pivotally mounted on the pin 73. A clevis 74 is pivotally connected to each of the latches and this clevis is fixed on a rod '75.which is slidably received within a sleeve 76. Each of the sleeves 76 is pivotally mounted on the beam 50. A spring 77 encircles the rod and is interposed between the clevis 74 and the sleeve 76. Lock nuts.78 on each rod 75 provide an abutment engaging one end of the sleeve 76. When the bar 50 swings against the stop 70, the tongue latch 72 is projected and the tongue latch 71 is retracted. A

shoulder 79 on the latch 72 engages the abutment pin 80' fixed on the tongue 38. Similarly, when the bar 50- engages the stop 69 the latch 71 is advanced and the latch 72 is retracted. The shoulder 81 on the latch 71 then engages the abutment pin 80.

The latching system for the carrier 30 includes the latches 82 and 83 which are each adapted to engage the laterally projecting lug 84 fixed to the carrier near the forward end thereof. The latches 82 and 83 are each pivotally mounted between the parallel parts of supporting brackets 85 mounted on the frame 11. Pivot pins 86 connect the latches to the brackets. Tension springs 87 swing the latches toward latching position. Parallel rods 88 and 89 project through apertures 90 in the rear cross member 14 and clevises 91 are provided on the rear ends of each of these rods. Each clevis 91 is pivotally connected to its respective latch by means of a pin 92. The forward ends of the rods 88 and 89 are slidably received within sleeves 93 pivotally connected to the bar 50. A stop collar 94 is mounted on the forward end of each of the rods. When the bar 50 swings to the position shown in Figure 2, the stop collar 94 is engaged by one of the sleeves 93 and the rod 89is tensioned to retract the latch 83 against the action of the spring 87. At the same time, the rod 88 remains at rest, wtih the latch 82 in operative position.

From this description it will be understood that when pressure fluid is admitted through hydraulic fitting 95 and exhausted through pressure fitting 96, a force is applied to the arm 53 and also to the bar 50. The bar 50 first moves away from the stop 69, retracting the tongue latch 71.' The tongue 38 is their free to swing about its pivot 41 and the force supplied by piston rod 51 to the arm 53 causes this movement to occur. At the same time, the rod 89 is tensioned to retract the latch 83 and allow the cable 55 connected on drum 56 to turn the carrier 30. The tongue 38 and carrier 30 move simultaneously. As the tongue 38 approaches the position shown in Figure 2, the pin 80 on the tongue engages the surface 97 on the latch 72 thereby deflecting the latch against the action of one of the springs 77 andpermitting the tongue to engage the limit stop 98; The spring then returns the latch 72 to latching position. Atthe same time, the lug 84 on the carrier 30 strikes the slanted nose.

portion 99 on the latch 82 thereby retracting it against the action of the spring 87 and permitting the lug 8410 rest on the abutment 100. V

In a similar manner, admission of pressure fluid in.

the hydraulic fitting 96 and exhaust from fitting serve to extend the piston rod 51 and thereby unlatch the tongue 38, unlatch the carrier 31, and thereafter simultaneously swing the tongue 38 and turn the carrier 30. As the tongue 38 swings in a counter-clockwise direction, as viewed in Figure 2, the pin 80 rides along the surface 101 on the latch 71 thereby retracting the latch against one of the springs 77. The tongue 38 comes to rest against the limit stop 102. As the projecting lug 84 on the carrier 30 approaches the abutment 103, the lug rides down the slanted nose portion 104 on the carrier latch 83 thereby retracting it against the action of the spring 87.

In operation, the power cylinder assemblies 22 are energized to raise the frame 11 and thereby to raise the plows clear of the ground. The device is then towed to the field behind the tractor. The power cylinder assembly 48 is then actuated to shift the tongue 38 to one side and turn the carrier 30 to bring a pair of plow shares into operating position. Forward motion of the tractor is then commenced and the pressure fluid is exhausted from the cylinders 22, thereby allowing the plows to enter the ground. At the far end of the field the power cylinders 22 are again energized to raise the plows out I of the ground. The tractor and plow carriage 10 are then turned around and the power cylinder assembly 48 is actuated to shift the tongue 38 and to turn the carrier 30 to bring the other pair of plow shares into position. One of the wheels 16 or 17 rolls in the furrow and the other rolls on unplowed ground. The tractor moves forward and the plow shares enter the ground as the pressure fluid is exhausted from the cylinders 22. The depth of the furrow is controlled by the setting of the adjustable stops 105 which engage wheel arms 18.

While I have shown moldboard plows 34 and 35, it will be understood that disc plows or other groundengaging plows may be used, if desired.

If desired, a tail wheel assembly may be mounted on the rear portion-of the carrier 30, as shown in my Patent No. 2,625,091 referred to above. The wheel in such assembly rolls on unplowed ground in either position of the carrier.

The modified form of my invention shown in Figures 6, 7, 8, and 9 is similar to that described above except that gearing is substituted for the cable and spooling drum. A gear sector is pivotally mounted on the frame by means of the pivot pin 119. This gear sector is connected to one of the parallel tongue shifting arms 5311 by means of the adjustable-length link 121. Apertures 117 and 118 are provided on the sector 120 and on the arm 53a for connection with the ends of the link 121 in order to vary the extent of movement of the tongue 38a with respect to the extent of movement of the sector 120.. A driven gear member. 122 is fixed to the forward end of the carrier 30a and meshes with the sector 120. A power cylinder assembly, not shown, acts on the arms 53a in the manner previously described to swing the tongue 38a about pivot 41a. This movement is communicated through the link 121 to the sector 120 and this in turn serves to rotate the gear member 122 and carrier 30a.

Adjusting the length of the link 121' permits variation in the relative angular positions of the sector 120 and tongue 38a. Changing the points of pivotal connection of the link 121 with the apertures 117 and 118' changes the relative amount of swinging movement of the tongue- 38a with respect to the required travel of the gear sector 120.

The meshing parts of the gear sectors 120 and 122 may be constructed as conventional bevel gear teeth, or, as shown in the drawings, these parts may take more rudimentary form adapted for economical production on a quantity basis. The notches 123 may be flame cut or punchedin a straight strip and the strip later bent to an arc to form the curved part 124. This part is fixed to the plate 125 by welding. The projections 126 are individually secured to the ring 127 and are shaped to mesh with the notches 123. The meshing parts 126 and 123 are well adapted to operate satisfactorily without special provisions to exclude dirt and foreign matter, and tend to be self-cleaning in action.

Having fully described my invention, it is to be understood that I do not wish to be limited to the details herein set forth, but my invention is of the full scope of the appended claims.

I claim:

1. In a two-way plow, the combination of: a mobile frame, a carrier turnably mounted on the frame for movement about a longitudinal axis, ground-engaging plow means on the carrier for producing either a right-hand furrow or a left-hand furrow, a draft tongue pivotally connected to the frame for lateral swinging movement, releasable latch means for holding the carrier in either of two positions, releasable latch means carried on the frame for holding the tongue in either of two positions, and a latch control member pivotally mounted on the frame and connected to actuate both of said latch means.

2. In a two-way plow, the combination of: a mobile frame, a carrier turnably mounted on the frame for move- 6 ment about a longitudinal axis, ground-engaging plow means on the carrier for producing either a right-hand furrow or a left-hand furrow, a draft tongue pivotally connected to the frame for lateral swinging movement, a first pair of releasable latches carried on the frame for holding the carrier in either of two positions, a second pair of releasable latches carried on the frame for holding the tongue in either of two positions, a latch control bar pivotally mounted on the frame, means including a pair of rods operatively connected to the latch control bar for actuating said first pair of latches, and means including a second pair of rods operatively connected to the latch control bar for actuating the second pair of latches.

References Cited in the file of this patent UNITED STATES PATENTS 68,310 Paine Aug. 27, 1867 903,032 Violati-Tescari Nov. 3, 1908 2,114,549 Taylor Apr. 19, 1938 2,625,089 Pursche Jan. 13, 1953 2,625,090 Pursche Jan. 13, 1953 FOREIGN PATENTS 1,150 Great Britain of 1872 

